All scholars of arithmetic comprehend of Peano's postulates for the common numbers and his recognized space-filling curve, but their wisdom usually stops there. a part of the reason being that there has now not formerly been a full-scale research of his lifestyles and works. This needs to absolutely be awesome, while one realizes the size of his educational occupation (over 50 years) and the level of his publica­ tions (over two hundred) in a wide selection of fields, lots of which had quick and long term results at the improvement of contemporary arithmetic.